<template>
  <div>
    <!-- 面包屑导航视图区域 -->
    <el-breadcrumb>
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>
        <a href="/goods">商品管理</a>
      </el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 添加按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddCateDialogVisible">添加分类</el-button>
        </el-col>
      </el-row>
      <!-- 表格区域 -->
      <tree-table
        :data="cateList"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        :show-index="true"
        index-text="#"
        border
        class="treetable"
      >
        <!-- 是否有效 -->
        <template v-slot:isOk="scope">
          <i
            class="el-icon-success"
            style="color:lightgreen"
            v-if="scope.row.cat_deleted === false"
          ></i>
          <i class="el-icon-error" v-else style="color:red"></i>
        </template>
        <!-- 排序 -->
        <template v-slot:order="scope">
          <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag size="mini" type="success" v-else-if="scope.row.cat_level === 1">二级</el-tag>
          <el-tag size="mini" type="warning" v-else>三级</el-tag>
        </template>
        <!-- 操作 -->
        <template>
          <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
          <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
        </template>
      </tree-table>
    </el-card>
    <!-- 分页区域 -->
    <el-pagination
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
      :current-page="queryInfo.pagenum"
      :page-sizes="[1, 2, 5, 10]"
      :page-size="queryInfo.pagesize"
      layout="total, sizes, prev, pager, next, jumper"
      :total="total"
    ></el-pagination>
    <!-- 添加分类对话框 -->
    <el-dialog title="添加分类" :visible.sync="addCateDialogVisible" width="50%"  @close="addCateDialogClosed">
      <el-form
        :model="addCateForm"
        :rules="addCateFormRules"
        ref="addCateFormRef"
        label-width="100px"
        class="demo-ruleForm"
       
      >
        <!-- 添加分类表单 -->
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级名称">
          <el-cascader
            v-model="selectedKeys"
            :options="parentCateList"
            :props="cascaderProps"
            @change="parentCateChange"
            clearable
            change-on-select
          ></el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      cateList: [],
      parentCateList: [],
      total: 0,
      addCateDialogVisible: false,
      columns: [
        {
          label: "分类名称",
          prop: "cat_name"
        },
        {
          label: "是否有效",
          // 当前列 自定义模板
          type: "template",
          template: "isOk"
        },
        {
          label: "排序",
          // 当前列 自定义模板
          type: "template",
          template: "order"
        },
        {
          label: "操作",
          // 当前列 自定义模板
          type: "template",
          template: "opt"
        }
      ],
      addCateForm: {
        cat_name: "",
        cat_pid: 0,
        cat_level: 0
      },
      addCateFormRules: {
        cat_name: [
          { required: true, message: "请输入分类名称", trigger: "blur" }
        ]
      },

      cascaderProps: {
        expandTigger: "hover",
        value: "cat_id",
        label: "cat_name",
        children: "children"
      },
      selectedKeys: []
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    // 获取商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get("categories", {
        params: this.queryInfo
      });
      if (res.meta.status !== 200) {
        return this.$message.error("获取商品分类失败");
      }

      this.cateList = res.data.result;
      // 为总数据条数赋值
      this.total = res.data.total;
    },
    // 监听pagesize的改变
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize;
      this.getCateList();
    },
    // 监听pagenum的改变
    handleCurrentChange(newNum) {
      this.queryInfo.pagenum = newNum;
      this.getCateList();
    },
    // 点击按钮触发添加用户对话框
    showAddCateDialogVisible() {
      this.getParentCateList();
      this.addCateDialogVisible = true;
    },
    // 获取父级分类列表
    async getParentCateList() {
      const { data: res } = await this.$http.get("categories", {
        params: { type: 2 }
      });
      if (res.meta.status !== 200) {
        return this.$message.error("获取父级列表失败！");
      }
      this.parentCateList = res.data;
    },
    parentCateChange() {
      console.log(this.selectedKeys);
      if (this.selectedKeys.length > 0) {
        this.addCateForm.cat_pid = this.selectedKeys[
          this.selectedKeys.length - 1
        ];
        this.addCateForm.cat_level = this.selectedKeys.length;
        return;
      } else {
        this.addCateForm.cat_pid = 0;
        this.addCateForm.cat_level = 0;
      }
    },
    addCate() {
      this.$refs.addCateFormRef.validate(async valid => {
        if (!valid) return;
        const { data: res } = await this.$http.post(
          "categories",
          this.addCateForm
        );
        if (res.meta.status !== 201) {
          return this.$message.error("添加分类失败！");
        }
        this.$message.success("添加分类成功");
        this.getCateList();
        this.addCateDialogVisible = false;
      });
    },
    addCateDialogClosed() {
      this.$refs.addCateFormRef.resetFields()
      this.selectedKeys = [];
      this.addCateForm.cat_pid = 0;
      this.addCateForm.cat_level = 0;
    }
  }
};
</script>

<style scoped>
.treetable {
  margin-top: 15px;
}
</style>